feat(platform)!: contested indexes resolved without locking, ties to the earliest contender (moderation teams A1) by QuantumExplorer · Pull Request #4907 · dashpay/platform

QuantumExplorer · 2026-09-22T01:28:24Z

Issue being fixed or feature implemented

Item A1 of the decentralized moderation teams split (#4865, sub-issue #4874). The moderation election is a contested unique resource already: the charter contract's byTargetContract index contends on the target contract id (D15, #4898). This PR replaces the separate identity contender poll kind of #4901 (closed) with a second way of resolving the existing contested index, and fixes the tie-break direction.

What was done?

ContestedIndexResolution::MasternodeVoteNoLocking = 1, a contested unique index resolved without a Lock choice. Meta-schema v3 admits "resolution": 1; the index parser refuses it below document type schema generation 3, so a chain below protocol version 14 never sees one.
No Lock. validate_state 1 of the masternode vote (PV14) refuses a Lock vote on such a contest with VoteChoiceNotAllowedForVotePollError (40307, StateError discriminant 142).
Single contender needs no vote week. add_contested_document_for_contract_operations 1 (PV14) writes the end-date entry of a no-locking contest at the end of the join window; the first additional contender moves it to the full poll duration, so a contest whose join window closes with one contender is awarded at once. getVotePollsByEndDate shows whichever end applies.
Ties go to the earliest contender. check_for_ended_vote_polls 1 (PV14) awards a tie to the earliest document (creation time, block height, core height, id) for every resolution. The shipped rule awarded the latest, which was a mistake; DPNS contests ending from PV14 on follow the new rule (this overrides D56).
Book chapter on contested documents, error codes, the v14 changelog entry and a pin test that v13 keeps the shipped versions.

The DPNS resolution keeps its Lock choice and its full poll duration for a single contender, since the masternodes may still lock it.

How Has This Been Tested?

dpp: the parser admits "resolution": 1 in generation 3 only; the TryFrom round trip.
drive-abci: a Lock vote refused and the other choices accepted; a single contender awarded when the join window closes and not before; a second contender moving the end date, a third finding it there, plurality at the poll end; a tie and a no-vote contest awarded to the earliest contender; a DPNS tie at PV14 awarded to the smaller document id.
Existing DPNS unit and strategy voting tests, clippy with the CI flags, wasm32 check of wasm-dpp, wasm-dpp2 and wasm-sdk.

Breaking Changes

Consensus at protocol version 14: the tie-break of contested documents flips to the earliest contender, a contested index may declare resolution 1, and a Lock vote on such an index is refused.

Checklist

I have performed a self-review of my own code
I have commented my code, particularly in hard-to-understand areas
I have added or updated relevant unit/integration/functional/e2e tests
I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

I have assigned this pull request to a milestone

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PR Hygiene · `c117301`

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Summary by CodeRabbit

New Features
- Added support for contested indexes that resolve without a Lock choice.
- Single-contender contests can be awarded when the joining period ends; additional contenders extend the contest to the full voting period.
- Ties are resolved in favor of the earliest contender starting with protocol version 14.
Documentation
- Added guidance on contested documents, contest lifecycles, voting rules, and resolution behavior.
- Documented the new voting error returned when a disallowed choice is submitted.

…the earliest contender - ContestedIndexResolution::MasternodeVoteNoLocking (resolution 1): a contested unique index without a Lock choice; meta-schema v3 and parser generation 3 admit it, so no chain below protocol version 14 sees one - masternode vote validate_state v1 refuses a Lock vote on such an index with VoteChoiceNotAllowedForVotePollError (40307) - add_contested_document_for_contract_operations v1 ends a no-locking contest at the close of its join window; the first additional contender moves the end date to the full poll duration, so a single contender is awarded without the vote window - check_for_ended_vote_polls v1 awards a tie to the earliest contender for every resolution; the shipped latest-wins rule was a mistake and DPNS contests ending from v14 on follow the new rule - book chapter on contested documents, error code, v14 changelog and a pin test that v13 keeps the shipped versions Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/masternode_vote/no_locking_contest_tests.rs

📝 Walkthrough

Walkthrough

The change adds protocol v14 support for contested indexes without a Lock choice. It adds schema admission, contest timing, vote validation, earliest-contender tie resolution, a new consensus error, tests, and documentation.

Changes

Contested index resolution

Layer / File(s)	Summary
Resolution contract and error model `packages/rs-dpp/schema/...`, `packages/rs-dpp/src/data_contract/...`, `packages/rs-dpp/src/errors/...`, `packages/wasm-dpp/...`, `packages/rs-drive-abci/tests/supporting_files/...`, `book/src/...`	Generation 3 accepts contested index resolution `1` as `MasternodeVoteNoLocking`. Generation 1 rejects it. The new `VoteChoiceNotAllowedForVotePollError` uses code `40307` and is converted to Wasm errors. Documentation and fixtures describe the new behavior.
Contest scheduling and version dispatch `packages/rs-drive/src/drive/document/insert_contested/...`, `packages/rs-platform-version/src/version/...`	No-locking contests end at the join-window boundary with one contender. A second contender moves the end date to the full poll duration. Protocol v14 selects the version 1 implementations.
Vote validation and poll resolution `packages/rs-drive-abci/src/execution/platform_events/...`, `packages/rs-drive-abci/src/execution/validation/...`	Version 1 rejects Lock votes for no-locking polls. Ended polls award the earliest contender in a tie using creation time, block height, core block height, and document ID. Tests cover voting, contest windows, ties, and protocol-version selection.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant DocumentInsertion
  participant VotePoll
  participant MasternodeVote
  participant PollResolution
  DocumentInsertion->>VotePoll: create or update contest end date
  MasternodeVote->>VotePoll: validate and store vote
  PollResolution->>VotePoll: query ended poll and tally
  PollResolution->>DocumentInsertion: award winning document

Merge Risk: 🔵 Low · up to 9b33a

The change adds protocol-version-14 contested indexes without a Lock choice and awards ties to the earliest contender. No user-facing defect was found in the runtime behavior; one new test appears to expect the wrong abstain count, which should be corrected so the new voting rules stay covered.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main changes: contested indexes without locking and earliest-contender tie resolution. The feature prefix and moderation label do not obscure the scope.
Docstring Coverage	✅ Passed	Docstring coverage is 80.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 85 functions across 21 files. (5 skipped: 5…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
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github-actions · 2026-09-22T01:28:47Z

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thepastaclaw · 2026-09-22T01:35:00Z

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…_vote_polls v1 Version 1 is selected from protocol version 14 only, so the clean-ups of the protocol version 1 to 2 upgrade and of epoch 1435 on testnet can never apply to it. It fetches the polls due by the block time, resolves them and awards a tie to the earliest contender, and nothing else. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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Inline comments:
In
`@packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/masternode_vote/no_locking_contest_tests.rs`:
- Around line 417-444: Update the abstain tally assertion for the successful
ResourceVoteChoice::Abstain call in the relevant test to expect Some(1) instead
of Some(0), leaving the surrounding vote setup and assertions unchanged.

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📒 Files selected for processing (26)

book/src/SUMMARY.md
book/src/data-model/contested-documents.md
book/src/error-handling/error-codes.md
packages/rs-dpp/schema/meta_schemas/document/v3/document-meta.json
packages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/common/mod.rs
packages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/v1/mod.rs
packages/rs-dpp/src/data_contract/document_type/class_methods/try_from_schema/v3/mod.rs
packages/rs-dpp/src/data_contract/document_type/index/mod.rs
packages/rs-dpp/src/errors/consensus/codes.rs
packages/rs-dpp/src/errors/consensus/state/state_error.rs
packages/rs-dpp/src/errors/consensus/state/voting/mod.rs
packages/rs-dpp/src/errors/consensus/state/voting/vote_choice_not_allowed_for_vote_poll_error.rs
packages/rs-drive-abci/src/execution/platform_events/voting/check_for_ended_vote_polls/mod.rs
packages/rs-drive-abci/src/execution/platform_events/voting/check_for_ended_vote_polls/v1/mod.rs
packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/masternode_vote/mod.rs
packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/masternode_vote/no_locking_contest_tests.rs
packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/masternode_vote/state/mod.rs
packages/rs-drive-abci/src/execution/validation/state_transition/state_transitions/masternode_vote/state/v1/mod.rs
packages/rs-drive-abci/tests/supporting_files/contract/dpns/dpns-contract-contested-unique-index-no-locking.json
packages/rs-drive/src/drive/document/insert_contested/add_contested_document_for_contract_operations/mod.rs
packages/rs-drive/src/drive/document/insert_contested/add_contested_document_for_contract_operations/v1/mod.rs
packages/rs-platform-version/src/version/drive_abci_versions/drive_abci_method_versions/v10.rs
packages/rs-platform-version/src/version/drive_abci_versions/drive_abci_validation_versions/v10.rs
packages/rs-platform-version/src/version/drive_versions/drive_document_method_versions/v4.rs
packages/rs-platform-version/src/version/v14.rs
packages/wasm-dpp/src/errors/consensus/consensus_error.rs

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…change The masternode votes Abstain and then changes its vote towards a contender; a changed vote replaces the previous one, so the abstain tally is 1 after the first vote and 0 after the second. The test now checks both states. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

QuantumExplorer

Reviewed

The charter's contested index now uses the masternode vote without a Lock choice that #4907 brought (resolution 1) instead of a marker of its own: the ModerationElection resolution, its admission, the reservation error (11007) and their tests are gone, and the v14 changelog entry is item 24. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

github-actions Bot added this to the v4.2.0 milestone Sep 22, 2026

github-actions Bot added the waiting-bots Waiting for the review bots to report on this head label Sep 22, 2026

This was referenced Sep 22, 2026

Decentralized moderation teams: masternode-elected moderators per contract (decisions and open questions) #4865

Open

Vote polls: identity contender poll kind without Lock, plurality, first-wins tie-break (moderation teams A1) #4874

Open

coderabbitai Bot reviewed Sep 22, 2026

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Comment thread ...on/validation/state_transition/state_transitions/masternode_vote/no_locking_contest_tests.rs

QuantumExplorer commented Sep 22, 2026

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QuantumExplorer merged commit f7bfcbc into v4.2-dev Sep 22, 2026
39 of 40 checks passed

QuantumExplorer deleted the claude/no-locking-resolution branch September 22, 2026 03:38

This was referenced Sep 22, 2026

feat(platform)!: yes/no masternode vote poll kind with supermajority and minimum voting power #4899

Open

feat(platform)!: moderation charters system data contract (moderation teams C1) #4898

Open

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feat(platform)!: contested indexes resolved without locking, ties to the earliest contender (moderation teams A1) - #4907

feat(platform)!: contested indexes resolved without locking, ties to the earliest contender (moderation teams A1)#4907
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